for letter in 'Python':
    print("当前字母%s", letter)


fruits = ['banana', 'apple', 'mongo']

for abc in fruits:
    print(abc)
abc = range(len(fruits))
print(abc)

print("----------------------------")
for item in range(len(fruits)):
    print(fruits[item])

var = 10
while var > 0:
    print(var)
    var = var - 1
    print(var)
    if var == 5:
        break

print("Good bye!")
